往复活塞泵工作特性影响因素分析  

Dynamic characteristics and influence factors analysis of reciprocating pump-fed propulsion system

作　　者：聂侥 程玉强[1] 吴建军[1] 李是良[2] 

机构地区：[1]国防科技大学航天科学与工程学院,湖南长沙410073 [2]国防科技大学指挥军官基础教育学院,湖南长沙410072

出　　处：《国防科技大学学报》2016年第6期82-88,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51206181)

摘　　要：为了系统地研究往复活塞泵的动态特性,分析往复活塞泵工作特性的影响因素,应用模块化建模思想,采用集中参数模型,基于AMESim平台建立了往复活塞式自增压系统仿真模型。分别研究蓄压器气腔初始压力、燃气发生器下游等效容腔体积和燃气发生器喷嘴数量对往复活塞泵工作特性的影响。结果表明:蓄压器气腔初始压力越大,往复活塞泵启动越快,但是其稳定工作时调节能力越弱;燃气发生器下游等效容腔的体积越小,往复活塞泵的启动时间越短,但是压力波动越大;燃气发生器喷嘴个数越多,燃气发生器内压力波动越小,但是增压速度变慢,导致往复活塞泵启动时间有所增加。In order to investigate the dynamic characteristics and influence factors of reciprocating pump, a modular model library of the RPFPS （ reciprocating pump-fed propulsion system） was established. The modular model library was built on the basis of lumped parameter approximation and the dynamic simulation of the work process for RPFPS was carried out on the basis of the AMESim system. The effects of initial pressure of accumulator, equivalent volume of pipeline under gas generator and number of nozzles on the dynamic characteristics of reciprocating pump were studied. Results have been obtained as follows ： due to the bigger initial pressure of accumulator, less time was used to start the reciprocating pump, but the regulation ability of accumulator was weaker; it would take less time to start the reciprocating pump because of larger equivalent volume of pipeline under gas generator, but it would also lead to the increase of pressure fluctuation; the greater the number of nozzles, the lower the pressure fluctuation in gas generator, and the more time of reciprocating pump to start because of the slower pressure increasing speed.

关 键 词：往复活塞式自增压系统 姿/轨控动力系统 往复增压泵 系统仿真 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]